What is the most common cause of tooth decay?

High sugar consumption is recognized as the most common cause of tooth decay due to the way sugar interacts with the bacteria in the mouth. When sugars are consumed, particularly in the form of snacks or beverages, they provide fuel for bacteria that naturally reside in the oral cavity. These bacteria metabolize the sugars and produce acids as a byproduct. These acids can erode tooth enamel, leading to the formation of cavities.

Regular and high intake of sugar increases the frequency of acid attacks on the teeth, making it difficult for the enamel to remineralize and recover. This decay process can become progressive if not properly managed through good dental hygiene practices. While excessive fluoride intake, teeth grinding, and genetic factors can also contribute to dental health issues, they do not play as significant a role in the overall prevalence of tooth decay as high sugar consumption does. Effective dental care often emphasizes reducing sugar intake as a key strategy to prevent cavities and maintain oral health.